Tatung CM-1480 Bedienungs- und Montageanleitung

SERVICE

INFORMATION

MODEL

CM-1480

COLOUR

DISPLAY

MONITOR

Code

No.

79-1191-2

,,.,,

...

CM-1480

SERIES

COLOUR

DISPLAY

MONITOR

SERVICE

MANUAL

PAGE

CONTENTS

CHAPTER

SPECIFICATIONS

........

·····················

.1.1

CHAPTER

PRECAUTIONS

AND

NOTICES

2-1

SAFETY

PRECAUTIONS

.............

·········

2.1

2-2

PRODUCT

SAFETY

NOTICE

...........

········

2.1

2-3

SERVICE

NOTES

............

·············

2.2

CHAPTER

OPERATING

INSTRUCTIONS

3-1

CONTROLS

AND

CONNECTIONS

..........

······

3.1

3-2

SET

AND

OPERATION

............

········

3.2

CHAPTER

ADJUSTMENTS

4-2

MONITOR

ADJUSTMENT

DEVICES

.........

·····4.1

4-3

PREPARATION

...........

·················

.4.2

CHAPTER

TROUBLE-SHOOTING

CHARTS

5-1

ORGANIZATION

.............

···············

5-2

SAFETY

GUIDELINES

..............

·········

5.1

5-3

LEAKAGE

TEST

...........

············

5.2

5-4

SUGGESTED

TOOLS

AND

EQUIPMEMT

..........

·5.2

5-5

INSPECTION

AND

PREPARATION

...........

···5.3

5-6

COLOR

BAR

TEST

..............

········•···

5-7

WHITE

FIELD

.................

···········

.5.3

5-8

TROUBLESHOOTING

CHARTS

............

······

5.3

CHAPTER

LAYOUT

Fig

6-1

PCB-MAIN

COMPONENtS

LAYOUT

.........

·6.1

Fig

6-2

PCB-VIDEO

DRIVE

COMPONENTS

LAYOUT

...

6.2

Fig

6-3

PCB-CRT

DRIVE

COMPONENTS

LAYOUT

.....

6.2

Fig

6-4

PCB-POWER

COMPONENTS

LAYOUT

.........

6.3

CHAPTER

SCHEMATIC

DIAGRAM

Fig

7-1

MAIN

CIRCUIT

DIAGRAM

...........

·····7.1

Fig

7-2

POWER

CIRCUIT

DIAGRAM

...........

····7.2

CHAPTER

REPLACEMENT

PARTS

LIST

8-1

ASSEMBLY

AS/lIS

..........

·.··············

8-2

ASSEMBLY

PCB-MAIN

PWB-1323-02

...........

8.1

8-3

ASSEMBLY,

PCB-VIDEO

PWB-1324-02

.........

8.7

8-4

ASSEMBLY,

PCB-CRT

DRIVE

PWB-1337-02

.....

8.9

8-5

ASSEMBLY.

pcB-POWER

PWB-1345-02

.........

8-6

ASSEMBLY.

PCB-POWER

LINE

FILTER

PWB-1254-05

..............

·····

8-7

ASSEMBLY.

PCB-INDICATOR

PWB-1357-01

.....

8-S

MISCELLANEOUS

...............

············

APPLICATION:

POWER

INPUT:

VIDEO

SIGNAl.S:

SYNC.

SIGNAl.S:

CHAPTER

SPECIFICATIOIIS

Typical data display device for personal

computer

-applications.

watts

(Nominal),

rated voltage-refer to

backcover

label. A2

metre

3-wire

mains

cord

supplied.

colour:

Red.

green.

blue

and

intensity

video

signals.

colour:

R.G,B,

and

r,g,b, (intensity) video signals.

All

are positive

TTL.

Horizontal:

15.75kHz

+/-

300Hz

(lode

21.853kHz

+/-

300Hz

(mode

positive

TTL,

autoswitching

TTL.

Vertical:

47-63Hz

positive

TTL

mode

47-63Hz

negative

TTL

lode

SIGNAL

CONNECTOR:

9-Pin D-shell connector.

DISPLAY

TUBE:

14".

deflection,

29.1mm

neck,

0.31.1 dot pitch.

dot

inline.

dark

tint

non-glare.

Type

No.:

M34JDU30X66

DISPLAY

AREA:

Width:

250mm

Height: 1700

DISPLAY

COLOUR:

Mode

colours.

Mode

colours.

DISPLAY

CHARACTER:

2000

characters

(80CH.

X25

Rowan

8x8

dot

.atrix)

DISPLAY

TIME:

RETRACE

TIME:

RESO

LUTI

KISCONVERGENCE:

Horizontal:

mode

44.5us

mode

39.37us

Vertical:

mode

12.58ms

mode

16.01ms

Horizontal:

mode

1: 6.0us

mode

6.0us

Vertical:

mode

1.215

mode

0.615

Horizontal:

640

dots

Vertical:

mode

200

scan

lines (non-interlaced)

mode

350

scan

lines (non-interlaced)

0.5mm

Max.

within data area.

USER

CONTROl.S:

Power

on-off, brightness, contrast.

vertical

size 1,

vertical size

Multi

colour switch, horizontal centre

horizontal centre

video

reverse

SWitch,

power

voltage

120VAC/240VAC

selector.

SERVICE

CONTROLS:

H-Hold

H-Width

H-Centre.

V-Centre.

V-Hold,

Focus.

Screen.

E-W

Pincusion. set

ERT.

R-Drive.

r-Drive.

G-Drive;

g-Drive.

R-BKG.

G-BKG.

B+12.75V.

ENVIRONMENTAL:

Operation:

10°C

35°C

ambient

Storage:

-40°C

DIMENSIONS:

WEIGHT:

Humidity:

50%

80%

(non-condensing)

Altitude:

7000

feet

above

sea level.

365

(W)

315

(H)

400

(D)

••

13.Skg

(net)

1.1

ENVIRONMENTAL:

DIMENSIONS:

WEIGHT:

Operation:

100e

to 35°e ambient

Storage: -40oe to

Humidity:

50%

80%

(non-condensing)

Alitude: to

7000

feet

above

sea

level.

365

(W)

315

(H)

400

(D)

13.5kg (net)

1.2

CHAPTER

PRECAUTIONS

AND

NOTICES

2-1

SAFETY

PRECAUTIONS

Observe

all

cautions

and

safety

notes located inside the

display cabinet

and

the display chassis.

Operation

these displays outside the cabinet or with the cover

removed,

involves a

shock

hazard

from

the display

power

supplies.

Work

the display should not

attempted

anyone

who

not

thoroughly familiar with precautions necessary

when

working

high

voltage equipment.

not

install,

remove

handle the picture tube

any

manner

unless shatter-proof goggles are

worn.

People

not

equipped should

kept

away

while handling picture tube.

Keep

picture tube

away

from

the

body

while handling.

The

picture tube is constructed to limit

X-RADIATION

0.5

mR/HR

300

microamperes

anode

current.

For

continued protection,

use

the

recommended

replacement tube only,

and

adjust the voltages

that

the designated

maximum

rating

the

anode

will not

exceeded.

Before

returning a serviced display to the customer, a thorough

safety

test

must

performed

to verify that the display

safe to

operate without danger

shock.

Always

perform

leakage

current

check

the

exposed

metallic parts

the cabinet.

Proceed

follows:

Connect

the monitor

power

lead

the

mains

supply, via

isolation

transformer,

and

switch

on.

Using

the

test

circuit

shown

in Fig.

measure

the

leakage current

between

each

pole

and

the

supply

and

all

accessible metal parts.

The

earth leakage current

must

not

exceed

3.5mA.

MAINS

INPUT

==-

CONNEC

EXPOSE

METAL

PARTS

I~I

MEASURING

CIRCUIT

RESISTANCE.

2000

Fig

2-1

LEAKAGE

CURRENT

TEST

CIRCUIT

2.1

PRCDU8T

SAFETY

NOTICE

Xany

electrical

and

mechanical

parts in this chassis provide special

visual safety protection.

The

protection afforded

them

cannot

necessarily

obtained

using replacement

components

rated for

higher voltage, wattage, etc

Before

replacing

any

these

components,

read

the

parts

list

this

manual

carefully.

The

use

substitute replacement parts

which

not

have

the

same

safety characteristics

specified

the parts

list

may

create

shock,

fire,

X-RAY

radiation

other hazards.

2-3

SERVICE

NOTES

When

replacing parts

circuit

boards,

wrap

the wires

around

terminals before soldering.

When

replacing a

high

wattage

resistor

(more

than

1/2W)

circuit

board,

keep

the

resistor

about

10mm

(1/2

in.)

away

from

circuit

board.

Keep

wires

away

from

high

voltage or

high

temperature

components.

Keep

wires

their

original position

reduce

interference.

"ARMIIIG

CHECK

POWER

VOLTAGE

SELECTOR

CORRECT

120

VAC

240

VAC

-...

..........

CHAPTER

OPERATING

INSTRUCTIONS

3-1

CONTROLS

AND

CONNECTIONS

POWER:

The

power

rocker switch turns the 1I0nitor

or off.

MULTI

COLOUR

INDICATOR:

green

LED

lights

when

the 1I0nitor

switched

with colour displayed

the

normal

state.

Push

Multi-colour switch

the

front

appropriate position for desired

:!<

BRI

GHTNESS:

CONTRAST:

f,c

120/240VAC

SELECTOR:

SIZE

and

2):

PHASE

and

2):

i.e

POWER

INPUT

JACK:

POWER

LEAD:

display.

The

brightness control sets the overall or

average intensity

illumination

the dis-

play

The

contrast control sets

the

intensity

the

data displayed.

The

selector switch adapts the monitor for

operation

from

the local

power

source.

The

vertical size adjustments

(mode

and

mode

set the

amount

vertical

(top to

bottom)

raster deflection.

The

horizontal

phase

adjustments

(mode

and

mode

set the horizontal

(left

to right)

position

the

display within the

raster

area.

A3-pin

power

connector

located

the rear

panel.

3-wire

mains

lead connects

power

the

monitor.

::c

VIDEO

SIGNAL

CABLE:

A 1.

cable, terminated

with

a 9

D-type

connector, supplies

video

and

sync. signals to

the

monitor.

The

cable

attached

the

monitor

and

not

detachable.

Fig

3-1

illus-

trastes

the

D-type

connector.

Table

3-1

lists

the

connector signal for

each

mode

opera-

tion.

VIDEO

REVERSE

SWITCH:

Move

the switch to reverse the

background

and

image

colours.

3.1

3-2

Set

and

Operation:

Perform

the

following steps

set

and

operate the monitor.

Place

the

monitor

flat

surface near

the

computer

and

near

power

outlet.

certain that

the

ventilation

slots

the

cabinet

are-

not

blocked

obstruc.ted.

Connect

the

video

signal cable

from

the

monitor

to the

computer.

Plug

the

power

cord

into

the

monitor

and

then

into

outlet.

certain that

the

120/240

VAC

selector switch

the rear panel

set

the

correct position.

WARNING:

Removing

the earth

from

the

power

source aay present a

potentially lethal

shock

hazard.

Turn

the

computer

and

the

monitor.

The

front

panel

green

LED

should

light.

The

system

prompt

for

the

computer

should

dis-

played.

Adjust

the

left

panel

brightness

and

contrast controls to obtain a

comfortable display.

your

CM-1480

monitor

requires service, refer to the controls

and

adjustments information

this

publication

and

verify that

all

controls

and

adjustments

the display are correctly set.

your

monitor

does

require service,

must

returned

with

the

mains

lead.

Table

3-1

Ho.

Fig

3-1

9-Pin

Colour

Monitor

Signal

Cable

Description

Mode

Shield

Gnd.

Ground

Signal

Gnd.

Red

Green

Blue

Intensity g

Unused

Horiz. sync. Horiz.

sync.

Vert. sync. Vert.

sync.

3.2

....

.........

4-1

CHAPTER

ADJUSTMENTS

This

chapter

~ontains

instructions for

performing

the

various

monitor

adjustments.

Because

these adjustments are

performed

while

the

monitor

is switched

on,

observe

proper

precautions

avoid

personal injury.

Specific

warnings

are included

where

necessary.

Paragraph

4-2

lists

the various adjustment devices

and

their

component

numbers.

They

are arranged according

the

circuit

board

location

where

they

can

found.

If a particular adjustment

does

not

correct a

problem,

refer

section 5 for additional information.

4-2

Monitor

Adjustment

Devices

DEVICE

R208

R209

R526

R527

R566

R567

R523

R563

R593

R309

R306

R366

R326

R408

R468

R433

R493

R413

R473

R435

R333

R907

R451

):t

R813

Focus

EXTERNAL

DESCRIPTION

Left

panel

brightness control

Left

panel

contrast control

VIDEO

BOARD

(PWB-1324)

Primary

red

drive

Secondary

red

drive

Primary

green

drive

Secondary

green

drive

CRT

BOARD

(PWB-1337)

Red

cut-off

Green

cut-off

Blue

cut-off

MAIN

BOARD

(PWB-1337)

POWER

SUPPLY

OTHER

Vertical

hold

Vertical size, lode I

(Rear

panel)

Vertical size,

mode

(Rear

panel)

Vertical centring

Horizontal

hold,

mode

Horizontal

hold,

mode

Horizontal

width,

mode

Horizontal width.

mode

HQrizontal

phase,

lode

(Rear

panel)

Horizontal phase,

lode

(Rear

panel)

Horizontal centring

E-W

pincus

ion

Sub-

brightness

22.5kV

EHT

B+

12.8

+/-O.lV

High

voltage

resistor

block

High

voltage resistor

block

....

"'"-."

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